Question

A circular loop of radius R carrying a current I is placed in a uniform magnetic field B perpendicular to the loop. The force on the loop is:

• A. $2\pi RIB$
• B. $2\pi R{I}^2{B}^3$
• C. $\pi R^{2}IB$
• D. zero

Answer 1

Answer: (D)

zero

A closed current-carrying loop when placed in a uniform magnetic field always experiences no net force.

The Force experienced by the loop is the cross product of the magnetic field and magnetic moment. Since both are parallel in this case, the force acting on the loop will be zero.